COROT-7 b (formerly called COROT-Exo-7 b ) [2] is an exoplanet ( super-earth ) that rotates around the COROT-7 star and is located in the constellation Unicorn . It was discovered in early 2009 by the COROT spacecraft.
| COROT-7 b | |
|---|---|
| Exoplanet | |
 COROT-7 b by the artist | |
| Parent star | |
| Star | COROT-7 |
| Constellation | Unicorn |
| Distance | 489 ± 65 [1] St. years old (150 ± 20 [1] pc ) |
| Elements of the orbit | |
| Semimajor axis ( a ) | 0.017 a. e. |
| Orbital Period ( P ) | 0.85 d. |
| Inclination ( i ) | 70 (± 10) ° |
| physical characteristics | |
| Radius ( r ) | 0.13 R J |
| Temperature ( T ) | 50 ° (unlit side) 2600 ° (light side) K |
| Discovery Information | |
| opening date | 2009 |
| Discoverer (s) | Short |
| Detection method | Transit method |
| Opening place | Earth orbit |
| Land | CoRoT-7 b |
|---|---|
 |  |
At that time, it was the smallest known exoplanet, its radius is 1.58 ± 0.1 Earth radii. According to research, the mass of the planet is 7.42 ± 1.21 earth masses [3] . Thus, the average density of the planet is estimated at 10.4 ± 1.8 g / cm 3 . The planet is located very close to the luminary (0.017 AU) and revolves around it for 20 hours, which makes the year on this planet one of the shortest of all known.
The COROT-7 star is slightly smaller than the Sun and is located 489 light years from Earth [4] .
Subsequently, it was found that on the planet (on its illuminated side) there is a vast lava ocean, which forms at a temperature of about + 2500-2600 ° C. This is above the melting point of most known minerals. The atmosphere of the planet consists mainly of vaporized rock, and falls on the dark and illuminated side with stone sediments. The planet is probably turned to the star constantly on one side [5] .
The conditions on the illuminated and unlit side of the planet are very different. While the illuminated side is a hot, seething ocean in continuous convection , the unlit side is probably on the crust of frozen lava and possibly covered with a huge layer of ordinary water ice.
Computer models have shown that CoRoT-7 b may be a rocky remnant of the gas giant the size of Saturn, which was “ evaporated ” by the star to the core [6] [7] .
See also
- List of exoplanets discovered in 2009
- Chthonic planet
- Gj 1214 b
- Kepler-10 b
- 55 Cancer e
- WASP-43 b
- Kepler-78 b
Notes
- ↑ 1 2 A. Léger, D. Rouan, J. Schneider et al. Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first Super-Earth with measured radius // Astronomy and Astrophysics : journal. - EDP Sciences 2009. - Vol. 506 . - P. 287-302 . - DOI : 10.1051 / 0004-6361 / 200911933 . - .
- ↑ Notes for Planet CoRoT-7 b . The Extrasolar Planets Encyclopaedia. Date of treatment August 8, 2011. Archived March 25, 2012.
- ↑ On the Mass of CoRoT-7b . Cornell University Library. Date of treatment August 8, 2011.
- ↑ COROT discovers smallest exoplanet yet, with a surface to walk on . European Space Agency (February 3, 2009). Archived March 25, 2012.
- ↑ Stone rains can occur on an exoplanet (inaccessible link) . Date of treatment October 3, 2009. Archived on September 8, 2010.
- ↑ Evolution of exoplanets. Based on materials from the Goddard Space Flight Center
- ↑ Corot-7b was a gas giant like Saturn: Scientists . brahmand.com. Date of treatment January 10, 2010. Archived March 25, 2012.